Module: Net::IMAP::Config::AttrTypeCoercion

Do not use. This module is for internal use only.

Relationships & Source Files
Namespace Children
Modules: `Macros`
Extension / Inclusion / Inheritance Descendants
Included In: `::Net::IMAP::Config`
Defined in:	lib/net/imap/config/attr_type_coercion.rb

Overview

NOTE: This module is an internal implementation detail, with no guarantee of backward compatibility.

Adds a type keyword parameter to .attr_accessor, to enforce that config attributes have valid types, for example: boolean, numeric, enumeration, non-nullable, etc.

Constant Summary

Enum =
# File 'lib/net/imap/config/attr_type_coercion.rb', line 46

->(*enum) {
  enum     = safe{enum}
  expected = -"one of #{enum.map(&:inspect).join(", ")}"
  safe{->val {
    return val if enum.include?(val)
    raise ArgumentError, "expected %s, got %p" % [expected, val]
  }}
}

NilOrInteger =
# File 'lib/net/imap/config/attr_type_coercion.rb', line 44
```
safe{->val { Integer val unless val.nil? }}
```

Types =
# File 'lib/net/imap/config/attr_type_coercion.rb', line 34

Hash.new do |h, type| type => Proc | nil; safe{type} end

Class Method Details

.attr_accessor(attr, type: nil)

[ GitHub ]

# File 'lib/net/imap/config/attr_type_coercion.rb', line 38


def self.attr_accessor(attr, type: nil)
  type = Types[type] or return
  define_method :"#{attr}=" do |val| super type[val] end
  define_method :"#{attr}?" do send attr end if type == Boolean
end

.included(mod) (private)

[ GitHub ]

# File 'lib/net/imap/config/attr_type_coercion.rb', line 26


def self.included(mod)
  mod.extend Macros
end

.safe (private)

[ GitHub ]

# File 'lib/net/imap/config/attr_type_coercion.rb', line 31


def self.safe(...) = Ractor.make_shareable nil.instance_eval(...).freeze